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HTML 

              
                <html lang="en" class="rwd">
	<head>
		<meta charset="utf-8">
		<title>Conserver une version Desktop avec une version Mobile sur le m&#xEA;me site web</title>
		<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
		<link rel="stylesheet" href="common.css" media="screen">
	</head>
	<body>
		<header>
			<div class="brand">
				
				<div class="logo component">
					<h3>Bruno Lesieur</h3>
				</div>

			</div>
			<div class="slogan">
				
				<div class="markdown component">
					<p>Statique ou Responsive ? Le 2 en 1 !</p>
				</div>

			</div>
			<div class="title">
				
				<div class="logo component">
					<h1>Conserver une version Desktop avec une version Mobile sur le m&#xEA;me site web</h1>
				</div>	

			</div>
			<nav class="main-nav">
				
				<div class="navigation component">
					<ul>
						<li><a href="http://blog.lesieur.name/conserver-une-version-desktop-avec-une-version-mobile-sur-le-meme-site-web/">Article explicatif</a></li>
						<li><a href="https://codepen.io/Haeresis/pen/aBmIj">Source du code</a></li>
						<li><a href="desktop-first_desktop-version.html">Version Desktop</a></li>
						<li><a href="desktop-first_mobile-version.html">Version Mobile</a></li>
						<li><a href="desktop-first_mobile-and-desktop-version.html">Version Desktop/Mobile</a></li>
					</ul>
				</div>		

			</nav>
		</header>
		<div class="content">
			<section class="overview">
				
				<div class="carousel component">
					<h1>&#xC0; propos</h1>
					<p>Cette exemple est expliqu&#xE9; dans l&apos;article suivant : <a href="http://blog.lesieur.name/conserver-une-version-desktop-avec-une-version-mobile-sur-le-meme-site-web/">Conserver une version Desktop avec une version Mobile sur le m&#xEA;me site web</a>.</p>
				</div>	

			</section>
			<nav class="anchor-nav">
				
				<div class="navigation component">
					<h2>Sommaire</h2>
					<ul>
						<li>
							<a href="#h1-title">D&#xE9;tails sur cet exemple</a>
							<ul>
								<li>
									<a href="#h2-title">Les versions</a>
									<ul>
										<li><a href="#h3-title-1">Mobile</a></li>
										<li><a href="#h3-title-2">Desktop</a></li>
										<li><a href="#h3-title-3">Mobile/Desktop</a></li>
									</ul>
								</li>
							</ul>
						</li>
					</ul>
				</div>

			</nav>
			<article class="main">
				<div class="article">

					<div class="markdown component">
						<header>
							<h1 id="h1-title">D&#xE9;tails sur cet exemple</h1>
							<p>Cette page est un exemple de site Responsive Web Design qui peut &#xEA;tre affich&#xE9; en version Desktop sur un(e) mobile/tablette.
						</p></header>

						<h2 id="h2-title">Les versions</h2>
						<p>Cette page existe en 3 versions, <a href="desktop-first_desktop-version.html">Version Desktop</a>, <a href="desktop-first_mobile-version.html">Version Mobile</a> et <a href="desktop-first_mobile-and-desktop-version.html">Version Desktop/Mobile</a>.</p>

						<h3 id="h3-title-1">Mobile</h3>
						<p>La Version Mobile est celle delivr&#xE9;e par d&#xE9;faut &#xE0; l&apos;arriv&#xE9; sur le site. En r&#xE9;alit&#xE9;, c&apos;est une version Responsive Web Design.</p>

						<h3 id="h3-title-2">Desktop</h3>
						<p>La Version Desktop est celle delivr&#xE9;e quand depuis un affichage plus petit que l&apos;affichage bureau, on demande l&apos;affichage bureau quelque soit la page.</p>

						<h3 id="h3-title-3">Mobile/Desktop</h3>
						<p>La version Mobile/Desktop est celle qui, sans rechargement de page, fait basculer le site du mode Responsive en mode Bureau.</p>

						<header>
							<footer>
								<p>Pour tester cet exemple :</p>
								<ul>
									<li>Si vous venez d&apos;un grand &#xE9;cran, pensez &#xE0; r&#xE9;tr&#xE9;cir la fen&#xEA;tre de votre navigateur pour faire appara&#xEE;tre en pied de page le lien de la version non Responsive.</li>
									<li>Si vous venez d&apos;un(e) mobile/tablette, cliquez juste sur le lien de pied de page.</li>
								</ul>
							</footer>
						</header>
					</div>

				</div>
				<ul class="step-list">
					<li class="step">

						<div class="markdown component">
							<h3>R&#xE9;tr&#xE9;cir</h3>
							<p>1. Observer ce qu&apos;il se passe quand la fen&#xEA;tre r&#xE9;tr&#xE9;ci.</p>
						</div>

					</li>
					<li class="step">
						
						<div class="markdown component">
							<h3>Changer de version</h3>
							<p>2. Cliquez sur le lien en pied de page pour changer de version.</p>
						</div>

					</li>
					<li class="step">
						
						<div class="markdown component">
							<h3>Re-changer de version</h3>
							<p>3. Cliquez de nouveau sur le lien en pied de page pour re-changer de version.</p>
						</div>

					</li>
				</ul>
			</article>
			<ul class="call-to-action-list">
				<li class="call-to-action">
					
					<div class="markdown component">
						<h2>Version Mobile</h2>
						<p><a href="desktop-first_mobile-version.html">Afficher la page de rendu mobile</a></p>
					</div>

				</li>
				<li class="call-to-action">
		
					<div class="markdown component">
						<h2>Version Desktop</h2>
						<p><a href="desktop-first_desktop-version.html">Afficher la page de rendu bureau</a></p>
					</div>			

				</li>
				<li class="call-to-action">
		
					<div class="markdown component">
						<h2>Version Mobile/Desktop</h2>
						<p><a href="desktop-first_mobile-and-desktop-version.html">Afficher la page de switch en live</a></p>
					</div>			

				</li>
			</ul>
		</div>
		<footer>
			<nav class="secondary-nav">
				
				<div class="navigation component">
					<ul>
						<li>
							<a href="http://www.haeresis.fr/#/me-contacter">Contactez-nous</a>
						</li>
					</ul>
				</div>

			</nav>
			<div class="legals">
				
				<div class="markdown component">
					<p>&#xA9;Tous droits non r&#xE9;serv&#xE9;s</p>
				</div>	

			</div>
			<div class="utils">
				
				<div class="markdown component">
					<p><a class="display-desktop" href="desktop-first_desktop-version.html">Afficher version Bureau</a></p>
					<p><a class="display-responsive" href="desktop-first_mobile-version.html">Afficher version Mobile/Tablette</a></p>
				</div>	

			</div>
		</footer>
		<script src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
		<script src="common.js"></script>
	</body>
</html>
!

CSS 

              
                /*------------------------------------*\
    $SUMMARY
\*------------------------------------*/

/**
 * SUMMARY.................It's me !
 * RESET...................Same render for all browser.
 * TEST....................Some activable or desactivale CSS rules for debug.
 * GRID....................Grid base 12 columns.
 * ALIGNMENT...............Align content of colums.
 * VISTIBLE / HIDDEN.......Hide / Display colums.
 */





/*------------------------------------*\
    $RESET
\*------------------------------------*/

* {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
}





/*------------------------------------*\
    $TEST
\*------------------------------------*/

.brand:before,
.slogan:before,
.title:before,
.main-nav:before,
.overview:before,
.anchor-nav:before,
.main:before,
.call-to-action:before,
.secondary-nav:before,
.legals:before,
.utils:before {
    width: 100%;
    display: inline-block;
}

.brand:before {
    content: "Brand";
    background-color: rgba(0, 0, 150, 0.5);
}
.slogan:before {
    content: "Slogan";
    background-color: rgba(150, 150, 0, 0.5);
}
.title:before {
    content: "Title";
    background-color: rgba(255, 0, 0, 0.2);
}
.main-nav:before {
    content: "Nav";
    background-color: rgba(0, 255, 0, 0.2);
}
.overview:before {
    content: "Overview";
    background-color: rgba(150, 0, 0, 0.5);
}
.anchor-nav:before {
    content: "Anchor nav";
    background-color: rgba(0, 0, 255, 0.2);
}
.main:before {
    content: "Main";
    background-color: rgba(255, 255, 0, 0.2);
}
.call-to-action:before {
    content: "Call to action";
    background-color: rgba(255, 0, 255, 0.2);
}
.secondary-nav:before {
    content: "Secondary nav";
    background-color: rgba(0, 150, 0, 0.5);
}
.legals:before {
    content: "Legals";
    background-color: rgba(0, 255, 255, 0.2);
}
.utils:before {
    content: "Utils";
    background-color: rgba(150, 0, 150, 0.5);
}
.main:before {
    content: none;
}
.article:before {
    content: "Article";
    background-color: rgba(255, 255, 0, 0.2);
    width: 100%;
    display: inline-block;
}
.step:before {
    content: "Step";
    background-color: rgba(0, 255, 0, 0.2);
    width: 100%;
    display: inline-block;
}





/*------------------------------------*\
    $GRID
\*------------------------------------*/

/*
.span12-12 { width: 100%; }
.span12-11 { width: 91.66666667%; }
.span12-10 { width: 83.33333333%; }
.span12-9 { width: 75%; }
.span12-8 { width: 66.66666667%; }
.span12-7 { width: 58.33333333%; }
.span12-6 { width: 50%; }
.span12-5 { width: 41.66666667%; }
.span12-4 { width: 33.33333333%; }
.span12-3 { width: 25%; }
.span12-2 { width: 16.66666667%; }
.span12-1 { width: 8.33333333%; }

.pull12-12 { right: 100%; }
.pull12-11 { right: 91.66666667%; }
.pull12-10 { right: 83.33333333%; }
.pull12-9 { right: 75%; }
.pull12-8 { right: 66.66666667%; }
.pull12-7 { right: 58.33333333%; }
.pull12-6 { right: 50%; }
.pull12-5 { right: 41.66666667%; }
.pull12-4 { right: 33.33333333%; }
.pull12-3 { right: 25%; }
.pull12-2 { right: 16.66666667%; }
.pull12-1 { right: 8.33333333%; }
.pull12-0 { right: 0; }

.push12-12 { left: 100%; }
.push12-11 { left: 91.66666667%; }
.push12-10 { left: 83.33333333%; }
.push12-9 { left: 75%; }
.push12-8 { left: 66.66666667%; }
.push12-7 { left: 58.33333333%; }
.push12-6 { left: 50%; }
.push12-5 { left: 41.66666667%; }
.push12-4 { left: 33.33333333%; }
.push12-3 { left: 25%; }
.push12-2 { left: 16.66666667%; }
.push12-1 { left: 8.33333333%; }
.push12-0 { left: 0; }

.prepend12-12 { margin-left: 100%; }
.prepend12-11 { margin-left: 91.66666667%; }
.prepend12-10 { margin-left: 83.33333333%; }
.prepend12-9 { margin-left: 75%; }
.prepend12-8 { margin-left: 66.66666667%; }
.prepend12-7 { margin-left: 58.33333333%; }
.prepend12-6 { margin-left: 50%; }
.prepend12-5 { margin-left: 41.66666667%; }
.prepend12-4 { margin-left: 33.33333333%; }
.prepend12-3 { margin-left: 25%; }
.prepend12-2 { margin-left: 16.66666667%; }
.prepend12-1 { margin-left: 8.33333333%; }
.prepend12-0 { margin-left: 0; }

.append12-12 { margin-right: 100%; }
.append12-11 { margin-right: 91.66666667%; }
.append12-10 { margin-right: 83.33333333%; }
.append12-9 { margin-right: 75%; }
.append12-8 { margin-right: 66.66666667%; }
.append12-7 { margin-right: 58.33333333%; }
.append12-6 { margin-right: 50%; }
.append12-5 { margin-right: 41.66666667%; }
.append12-4 { margin-right: 33.33333333%; }
.append12-3 { margin-right: 25%; }
.append12-2 { margin-right: 16.66666667%; }
.append12-1 { margin-right: 8.33333333%; }
.append12-0 { margin-right: 0; }

.pull-push { position: relative; }
.gutter { padding-left: 16px; padding-right: 16px; }
.pull-push-reset { position: static; }
.gutter-reset { padding-left: 0; padding-right: 0; }
.list-reset { margin: 0;padding: 0;list-style-type: none; }
.clearfix { clear: both; }
*/

body > header,
body > footer,
.content {
    margin-left:auto;
    margin-right:auto;
    width: 1200px;
}

    body > header:after,
    body > footer:after,
    .content:after,
.grid:after {
    content: "";
    clear: both;
    display: block;
}

/* Large desktop */
    .brand,
    .slogan,
    .title,
    .main-nav,
    .overview,
    .anchor-nav,
    .main,
    .article,
    .step,
    .call-to-action,
    .secondary-nav,
    .utils,
    .legals,
.columns {
    float: left;
    width: 100%;
}

    .brand,
    .slogan,
    .title,
    .main-nav,
    .overview,
    .anchor-nav,
    .article,
    .step,
    .call-to-action,
    .secondary-nav,
    .utils,
    .legals,
.gutter { padding-left: 16px; padding-right: 16px; }

    .step-list,
    .call-to-action-list,
.list-reset { margin: 0;padding: 0;list-style-type: none; }

    .title,
.clearfix { clear: both; }

    .brand,
.span12-2 { width: 16.66666667%; }
    .utils,
    .anchor-nav,
.span12-3 { width: 25%; }
    .main-nav,
    .step,
    .call-to-action,
.span12-4 { width: 33.33333333%; }
    .title,
.span12-8 { width: 66.66666666%; }
    .main,
    .legals,
.span12-9 { width: 75%; }
    .slogan,
.span12-10 { width: 83.33333333%; }

    .rwd .legals,
.span12-12 { width: 100%; }

    .call-to-action,
    .slogan,
    .brand,
.pull-push { position: relative; }

    .slogan,
.pull12-2 { right: 16.66666667%; }
    .brand,
.push12-10 { left: 83.33333333%; }

    .call-to-action:nth-child(odd),
.prepend12-2 { margin-left: 16.66666667%; }
    .call-to-action:nth-child(even),
.append12-2 { margin-right: 16.66666667%; }



/* Desktop */
@media (max-width: 1199px) {
.rwd body > header,
.rwd body > footer,
.rwd .content {
    max-width: 1200px;
    width: auto;
}

    .rwd .legals,
.span12-9 { width: 75%; }

    .rwd .call-to-action,
.pull-push-reset { position: static; }

    .rwd .call-to-action:nth-child(odd),
.prepend12-0 { margin-left: 0; }
    .rwd .call-to-action:nth-child(even),
.append12-0 { margin-right: 0; }
}



/* Tablet / Small desktop */
@media (max-width: 991px) {
    .rwd .call-to-action,
.span12-6 { width: 50%; }
}



/* Mobile / Small tablet */
@media (max-width: 761px) {
    .rwd .brand,
    .rwd .slogan,
    .rwd .title,
    .rwd .main-nav,
    .rwd .overview,
    .rwd .anchor-nav,
    .rwd .main,
    .rwd .article,
    .rwd .step,
    .rwd .call-to-action,
    .rwd .secondary-nav,
    .rwd .utils,
    .rwd .legals,
.columns {
    width: 100%;
}

    .rwd .brand,
    .rwd .slogan,
.pull-push-reset { position: static; }

    .rwd .brand,
.push12-0 { left: 0; }
    .rwd .slogan,
.pull12-0 { right: 0; }
}





/*------------------------------------*\
    $ALIGMENT
\*------------------------------------*/

/*
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }
*/

/* Large desktop */

    .utils,
    .brand,
.text-right { text-align: right; }



/* Mobile / Small tablet */
@media (max-width: 761px) {
    .rwd .brand,
.text-left { text-align: left; }

    .rwd .utils,
.text-center { text-align: center; }
}




  
/*------------------------------------*\
    $VISTIBLE / HIDDEN
\*------------------------------------*/

/*
.display-block, visible { display: block; }
.display-inline { display: inline-block; }
.display-inline-block { display: inline-block; }
...
.display-none, hidden { display: none; }
*/

/* Large desktop */

    .rwd .utils,
    .call-to-action:nth-child(n+3),
    .display-desktop,
    .rwd .display-responsive,
.display-none, hidden { display: none; }

    .rwd .display-desktop,
.display-block, visible { display: block; }



/* Desktop */
@media (max-width: 1199px) {
    .rwd .utils,
    .rwd .call-to-action:nth-child(n+3),
.display-block, visible { display: block; }
}



/* Tablet / Small desktop */
@media (max-width: 991px) {
    .rwd .call-to-action:nth-child(n+3),
.display-none, hidden { display: none; }
}



/* Mobile / Small tablet */
@media (max-width: 761px) {
    .rwd .step,
.display-none, hidden { display: none; }
}
!

JS 

              
                $(".display-desktop").click(function (e) {
	e.preventDefault();
	$("html")
		.removeClass("rwd");
	$("meta[name=viewport]").attr('content','');
});
$(".display-responsive").click(function (e) {
	e.preventDefault();
	$("html")
		.addClass("rwd");
	$("meta[name=viewport]").attr('content','width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no');
});
!
999px

Console